Insecticide bomb



Nov. 28, 1950 G. BROWN INSECTICIDE BOMB Filed Sept. 15, 1944 PatentedNov. 28, 1950 UNITED STATES PATENT OFFICE INSECTICIDE BOMB GregoryBrown, Bridgeport, Conn. Application September 15, 1944, Serial No.554.230

1 Claim.

This invention relates to dispensing apparatus for use in connectionwith the dispersion of insecticides.

The patent to Goodhue et al. No. 2,321,023 describes a methodofproducing insecticidal aerosol which involves confining in a receptacleunder superatmospheric pressure a liquified gas containing in solution asuitable insecticide and releasing the receptacle contents as desiredthrough a discharge orifice into the atmosphere. The receptacle contentsare forced out into the atmosphere by the high vapor pressure of theliquefied gas and the liquid solvent instantly evaporates into theatmosphere separating the solute into particles of colloidal dimensionsand leaving them suspended in air in the form of an aerocolloid which isknown as aerosol.

An object of this invention is an expensive and highly efficient devicefor releasing and dispersing insecticides in accordance with the Goodhueet a1. method.

Other objects, novel features and advantages of this invention willbecome apparent from the following specification and accompanyingdrawings, wherein:

Fig. 1 is an elevation partly broken away of an insecticide bombembodying the invention;

Fig. 2 is an enlarged fragmentary view through the release mechanism;

Fig. 3 is a section on the line 33 of Fig. 2, and

Fig. 4 is an enlarged fragmentary section similar to Fig. 2.

In the drawings, Ill is a receptacle of any suitable construction havingat one end an aperture into which is fitted a tubular member I I havinga gas-tight fit with the container. The member I I has a central bore I2of varying diameter and a pipe I3 has one end projecting into the borewith its remaining end arranged near the opposite end of the receptacleIll. A portion of the bore I2 is shaped to provide a valve seat 14 withwhich co-operates a valve I5 arranged in an enlarged portion I2a of thebore. The valve I5 is carried by a plug I5 arranged in the bore I2 andhaving threaded connection with the inner surface thereof at H. In theplug I5 is a central passageway I3 having its inner end terminatingabove the tip of the valve l5 and having a cross channel I9communicating with the chamber formed by the enlarged portion I241 ofthe bore l2. Rotation of the plug It causes axial movement of the valveIt into and out of engagement with the valve seat I4.

A cap Zll has a central aperture 2| of slightly larger cross-sectionthan the plug I6 and a threaded portion 22 screwed onto the tubularmember I! with the plug extending through the aperture. A thin sleeve 23of Babbitt metal snugly surrounds the plug I6 and has a flange 24resting on the outer end of the member II. The end of the sleeve 23 awayfrom'the flange 24 projects through the aperture 2| in the cap 28 andfills the gap between the aperture periphery and the plug surface. Aring 25 of flexible material such as neoprene surrounds the bushing 23and is contained in an inverted cup 26 arranged in the cap 25 and havingan aperture through which the sleeve 23 extends with the rim of the cupadjacent said flange.

A fluted rod 2'! is arranged in the passageway I8 and has upper andlower ends oblique with respect to the longitudinal axis thereof. Abushing 28 is threaded into a tapped recess 29 in the outer end of theplug I6 and receives the upper end of the rod 21 in a central bore 36*which ter minates in a restricted orifice 3 I. A flanged disk 32 isfixed to the plug 16 and provides means for efiecting rotation thereofas well as affords protection to the cap 29.

Under normal conditions, the plug I6 is so arranged that the valve I5engages the seat I4 thereby sealing the receptacle and the receptaclecontains under superatmospheric pressure a liquefied gas containing aninsecticide in solution. An insecticide of this character is disclosedin U. S. patent to Goodhue, No. 2,306,434. In order to make use of thedevice, the plug I6 is rotated through the medium of the disk 32 todisengage the valve I5 from the seat It whereupon the contents of thecontainer pass through the pipe I3 and around the valve I5 into thecross channel I9 and then through the grooves in the fluted rod El tothe orifice 3I from which they are discharged into the atmosphere. Theoblique face at the end of the rod 27 insures free flow of liquid to theorifice 3| irrespective of the position of the rod in the passageway.Operation of the device is discontinued by rotating the disk. 32

again to engage the valve It with the valve seat A metal-to-metal sealbetween the rotating and stationary parts of the device is obtained bymeans of the babbitt sleeve 23 in conjunction with the neoprene washer25. The thickness of the Babbitt metal sleeve 23 is of the order of .010inch. Upon screwing down of the cap 20, the flange 24 is forced by theneoprene washer intoa gas-tight seal with the end of the plug I6 and theneoprene washer is caused to bulge inwardly radially in such manner andto such extent as to distort the sleeve 23 inwardly into gas-tightrelation to the plug l6.

The fluted rod 21 provides a readily cleanable filter to prevent smallparticles from clogging the orifice 3|. The flow of the liquid throughthe fluted rod grooves and around the oblique end of the rod producesturbulence in the liquid as well as reduces the pressure so that theliquid is dispersed through the orifice 3| in the form of a dry spray.

In further explanation of the above; as the liquefied gas rises throughthe grooves of the fluted rod there is apparently a gradual pressuredecrease. Therefore, there is time for conversion to the gas phase in amore complete manner, than when the liquefied gas is directly introducedto the atmosphere through an orifice, so the grooves may be made largerthan such an orifice. Consequently, there is less chance for the groovesto become clogged with foreign matter than when an orifice is used. Theoblique rod end in the space 30 results in the various gas streams beingfreed from the confinement of the grooves at different locations thereinso that turbulence is effected. Any liquid gas escaping from the groovesis whirled around by this effect while the lighter gas phase can escapethrough the orifice 3!. Since the pressure is low in the space 39 anyliquefied gas therein rapidly converts to the gas phase. Therefore, thespray from the orifice 3| is free from droplets of liquid gas or, inother words, is dry. The orifice 31 may be made large since it is usedto eject the gas phase and is not required to eiTect the total pressuredrop needed for conversion of the liquefied gas to its gas phase.Consequently, there is little chance for this orifice 3| to becomeclogged.

I claim:

In a device for controlling the flow path through a member having acentral passageway terminating at one end in a recess of enlarged di- 4ameter and in the other end in a radial passageway, a bushing threadedto said recess and having its bore terminating in a discharge orifice inthe exposed end of said bushing and a fluted rod partly received in saidbore and partly in said passageway, said rod terminating at each end ina face oblique to the rod axis, said fluted rod forming with thesurfaces of said bore and passageway a plurality of channels eachterminating in the oblique faces at the opposite ends of said rod.

GREGORY BROWN.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 539,961 Russell May 28, 1895607,019 Comer July 12, 1898 679,733 Edgell Aug. 6, 1901 807,243 ChapinDec. 12, 1905 883,176 Davis Mar. 31, 1908 1,770,232 Fegley July 8, 19301,795,807 Terry Mar. 10, 1931 1,806,101 Thompson May 19, 1931 1,851,940Chouinard May 10, 1932 2,021,745 Pfelferle Nov. 19, 1935 2,069,630Steenstrup Feb. 2, 1937 2,132,011 Bennett et al Oct. 4, 1938 2,225,759Strout Dec. 24, 1940 2,243,995 Alden June 3, 1941 2,325,325 Kiene July27, 1943 FOREIGN PATENTS Number Country Date 11,824 Great Britain 1905385,380 Great Britain Dec. 29, 1932 389,658 Great Britain Mar. 23, 1933

